| 摘要: |
| 通过电感耦合测试技术考察管径、管长、流量、浓度等因素对硫酸钡出口浓度的影响,结合差压法和哈根-泊肃叶公式计算出毛细管内流速变化,给出模拟水源在毛细管内硫酸钡结垢现象与沉积动力学参数。通过物料衡算建立硫酸钡沉积动力学参数,且引入管内流动速率增强系数。结果表明:在实验范围内,流动速率增强系数随着管长和流量的增加而线性增加,而沉积动力学系数随着管径、管长和流量的增加呈现非线性增加的趋势,同时入口浓度对流动速率增强系数和沉积动力学参数几乎没有影响;管内流动速率增强系数和沉积动力学系数与实验结果吻合较好,误差小于(±20)％;管内进口处硫酸钡晶体较小,平均粒径10～20 μm,出口段沉积增长像树叶状或菜叶叠加状,晶体颗粒较大,平均粒径50～100 μm。 |
| 关键词: 油田注水 硫酸钡 沉积动力学 形态学 |
| DOI：10.3969/j.issn.1673-5005.2015.05.022 |
| 分类号::TE 19 |
| 基金项目:国家自然科学基金项目(21073020);北京市属高等学校高层次人才引进与培养计划项目(CIT＆TCD20130325) |
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| Scaling kinetics of barium sulfate in the capillary of the oilfield injected water |
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JIN Haibo, YANG Bei, YANG Suohe, HE Guangxiang
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(School of Chemical Enginerring in Beijing Institute of PetroChemical Technology, Beijing 102617, China)
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| Abstract: |
| The effects of diameter, length, flow, concentration on the barium sulphate (BaSO4) concentration at the capillary outlet were investigated through the inductively coupled plasma mass spectrometry (ICP-MS). And the flow velocity in the capillary was calculated using the differential pressure method and the Hagen-Poiseuille equation, through which the scaling phenomenon and the deposition kinetics of BaSO4 in the capillary tube were presented. Meanwhile, the deposition kinetics of BaSO4 was established using mass balance, and the flow rate enhancing coefficient was introduced. The experimental results show that the velocity enhancement factor linearly increases with the increase of the tube length and flow rate. However, the deposition kinetic coefficient nonlinearly increases with the increase of tube diameter, length and flow rate. In addition, the concentration at the inlet has slight influence on the flow rate enhancement factor and the deposition kinetic coefficient. The calculated deposition kinetic coefficient and flow rate enhancement factor are fitted well with the experimental data, and the error is within (±20)%. Also it is found that the BaSO4 crystal in the inlet is small with an average diameter of 10-20 μm. The deposition crystals in the outlet grow like leaf shaped, or leaves superposed with the crystal particle size of 50-100 μm. |
| Key words: oilfield injected water barium sulphate deposition kinetics morphology |
